Allen-Bradley 1734-IR2 RTD Input Module for POINT I/O Systems

Technical Specifications Breakdown

Key parameters for the 1734-IR2 are listed below for quick reference:

Industry Applications for Reliable Temperature Monitoring

Process industries such as chemical processing, food and beverage, and HVAC rely on precise temperature control. The 1734-IR2 supports a wide range of RTD sensors including 100 Pt α = 0.00385, 200 Pt α = 0.003916, 10 Cu α = 0.00427, and 100 Ni α = 0.00618, making it versatile for various media and temperature ranges. Its 16-bit resolution ensures fine granularity, while the 0.1% full scale accuracy at 25 °C minimizes measurement drift over time.

Installation and Setup Guidance

Mount the module on a 1734-TB, 1734-TBS, 1734-TOP, or 1734-TOPS wiring base assembly. Ensure the keyswitch is set to position 6 before insertion. Wire RTD sensors or 0-600 Ω resistance inputs to the appropriate terminals. The module uses a Delta Sigma conversion type and outputs data in signed integer format. Configure the notch filter frequency in your control software to match your local power line frequency—the default is 60 Hz, with options from 50 Hz to 480 Hz.

Maintenance and Reliability

Operating within -20 to 55 °C, this module is suitable for typical industrial environments. The open-style enclosure requires installation inside a protective cabinet. Periodically inspect wiring connections for corrosion or looseness. Thermal dissipation is 3.3 BTU/hour, so ensure adequate airflow around the base assembly.

Precision Temperature Measurement with the 1734-IR2

Accurate temperature monitoring is critical in industrial processes, yet many modules struggle with sensor compatibility and signal noise. The Allen-Bradley 1734-IR2 Resistance Temperature Detector (RTD) input module directly addresses this challenge. Part of the POINT I/O family from Rockwell Automation, this module provides two single-ended, non-isolated input channels designed for reliable resistance-based sensing.

Compatibility and Integration

It is compatible with Rockwell Automation controllers that support POINT I/O modules. The isolation voltage is 50 Volts continuous between channels and backplane.

Selection Guide and Purchasing Advice

When selecting an RTD input module, consider sensor type and resolution needs. The 1734-IR2 covers most common platinum, copper, and nickel RTDs. For resistance-only applications, it accepts 0-600 Ω signals directly. Contact AutoDCSTech to verify current lifecycle status and availability before ordering.

Troubleshooting and Common Issues

If readings are erratic, check the sensor wiring for shorts or opens. Verify the notch filter setting matches your line frequency—mismatch can cause 50/60 Hz noise. Ensure the module is fully seated in the base and the keyswitch is at position 6. If the module does not communicate, inspect the backplane connection and power supply.